Lock-nut.



J. J. FARRELL. I oooooo UT'. PPPPPPPPPP PPPPPPPPPPPPPPPP 0.

1,039,916. Patented 0011.'1, 1912.

i'nmasf: u

JOHN J. FARRELL, QF ARDMORE, PENNSYLVANIA.

LocK-NUT.

Specification of Letters Patent.

PatentedOct. 1, 1912.

Application filed June 13, 1910. Serial No. 566,593.

To all whom it may concern:

Be it known that 1", JOHN JAMES FA RRELL, a citizen of the United States, residing at Ardmore, in the county of Montgomery, State of Pennsylvania, have invented certain new and useful'lmprovements lnLock- Nuts, of which thev following is a descrlption, reference being hadto the acc.ompany-` ing drawings, formlng a part hereof. a

.My invention -relatesy to lock nuts of the type wherein the locking action is accomf lished by the distortion of a portionl of the body of the nut, and the object thereof to provide an improved lock nut formed in a single piece so that the entire Securing and locking function is accomplished .by means of a single integral nut structure, and, furthermore, to provide an improved lock nut in which the act of tightening the nut upon the bolt and against its seat results -in the distortion of the nut and accomplishes the looking action.

rThe accompanying drawing illustrates the preferred -embodiment of my invention .in a concrete lock nut, and the same is-described in the following specification and particularly claimed in the concluding claims.

In the drawing: Figure 1 is a view showing my improved lock nut in side elevation' Q upon the endof a bolt, the nut not belngb seated; and Fig. 2 is a view similar to Fig'] but.. showing the nut seated and the distor-' tion of the nut produced in screwing it to its seat, the nut being shown in section.

Referring to the drawing, 1 represents my `improved lock nut, the same having a.

threaded opening at 2 whereby it may be' -screwed upon a bolt 3., The under side of the nut 1 is inclined slightly with reference to the axis of the threaded opening 2 as will be seen in Fig. 1, so that the thicker portion of the nut at 4 will come into contact with the piece 5 against which the nut seatsfbefore the nut reaches its final position. Fig. 1 illustrates the nut as with its thicker portion nearly in contact with the piece 5 while Fig. 2 illnstrates the nut in its final seated position.

The nut 1 is provided with`1a slit l6 in its thicker portion, said slit extending from the side of the nut into and preferably about 'half way across the threaded opening 2.;

and said slit is preferably, but .not necessarily, inclined upwardly as shown. The

slitV is preferably located in the lower part of the thicker ,portion of the nut l soflas to leave more material above than 'below it.,

The slit 6 is wider at its outer end or at the periphery of the nut than at. any other portlon, the walls of the slit being inclined with reference to one another from the outer i end of the slit (to some point within the nut. The walls o f the slit are shown as approaching one vanother until at about the point where the slit intersecrts the threaded .opening of the nut, beyond which point the walls of the slit are parallel. The mutually inclined or converging walls referred to may be secured by inclining the outer portion of one Ionly,v or of both walls of the slit with reference to the inner portion of the walls, and as shown in Fig. 1 'this inclined relationship is secured by inclining 'the outer portion`7 ofthe upper wall of the slit '6 with reference to the inner portion 8 of such upper wall, the lower wall of' the slit being plane.

The degree of inclination of the walls asl aforesaid issuch that when the nut reaches its final position as shown in Fig. 2 the outer portlon of. the walls of the slit 6, that is the portions which are inclined with reference to one another, will contact with one another throughout a comparatively extensive area,'-

as indicated at 9, Fig. 2, andnot come into contact only' along the line formed by the intersection of the slit witha plane surface forming a part of the periphery of the nut as would obviously be the case if the sides of the slit were parallel throughout.

fiuch being the construction `of my ,improved lock' nut and it being understood that the opening at 2 is threaded uniformly throughout, it will be seen that the nut will move freely uponthe bolt 3 until the thickerI portion at 4 comes into contact with the piece 5 upon which the 'nut is to be seated. As the nut -is turned farther the thicker port-ion' 4. thereof will bel forced against the pice 5, and the' act of forcing the nut into its final position 'will result in the port-ion thereof' beneath thes'lit 6 being forced upward, thus bringing the inclined walls of the outer portion of .the slitinto contact with one another and producing a-binding and looking action between the threads of.the nut the bolt.

rIt'will be understood that while the frie- .and those of 'tion between the under side of the nut and the piece against which it seats is amply suflicient to prevent the nut from turning backward of itself land becoming loose, it may nevertheless be readily unscrewed as by a wrench; 'and that the nut may be repeat-- edly tightened and loosened as may be required without in any way injuring the nut or impairing its eflieiency.

Having thus described my invention'and explained its action, I claim and desire to secure by Letters Patent:

1.1A locknut formed as a single integral element and having a threaded opening and having its lower surface inclined with reference to said opening, and having also a slit located in its thicker portion and extending from the side of the nut into said threaded opening, the walls of the outer portion of said slit being inclined with reference to one another and said slit being widest at its outerend.

2. A lock lnut formed as a single integral element and having a threaded opening and having its lower surface inclined with referbence to said opening, and having also an inwalls of the outer portion .of said slit beingV inclined with reference to one another and said slit being widest at its outer end.

4. Alock nut formed as a single integral element and having a threaded opening and having its lower surface inclined with reference'to said opening, and having also an up- Wardly inclined slit located in its thicker portion and extending from the side of the nut into saidl threaded opening, the walls of the out'er portion of said slit being inclined with reference to one another and said slit being widest at its outer end.

5. A lock nut formed as a single integral element and having a threaded opening, and having its lower surface inclined With reference to saidiopening, and having also a slit located in the lower part of its thieker portion and extending from the side of the nut into said threaded opening, the walls of the outer portion of said slit being inclined with reference to one another and said slit being widest at its outer end.

6. A lock nut formed as a single integral element and having a threaded opening, and having its lower surface inclined with reference to said opening, and having also an upwardly inclined slit located in the lower part of its thicker portion and extending from the side of the nut into said threaded opening, the walls of the outer portionvof said slit being inclined with reference to' one another and said slit being Widest at its outer end.

This specifieation signed and witnessed this twenty-third day of May A. D. 1910.

` JOHN J. FARRELL. In the presence of- CHAs. B. CoNNoLLY, J as. C. HUGHEs. 

